Buttonhole; Important Information; Preparation; Thread Tension - Bernina 820 Owner's Manual

Important Information

If a buttonhole is to be sewn at right angles to
a seam, we recommend the use of the height
compensation plates for buttonholes (available
as optional accessory).
Using the compensation plate is recommend-
ed when sewing buttonholes in difficult fabrics.
It can be used with the Automatic buttonhole
foot no. 3A or the buttonhole foot 3B.

preparation

thread tension

► the tension is set automatically when a buttonhole is
selected
► the upper tension is slightly looser than normal
► this gives a slightly rounded appearance to the beads,
making the buttonhole more attractive
► cord reinforces buttonholes and enhances their appea-
rance
► sew both beads at the same speed

test Sewing

► always sew a test sample on the fabric with stabilizer
you intend to use
► select the buttonhole type you intend to use
► sew the buttonhole in the same direction on the fabric
(with or against the grain)
► cut the buttonhole open
► push the button through
► adjust the buttonhole length if necessary

corrections

to adjust the Bead Width
► alter the stitch width
altering the Stitch Length
► any alterations to the stitch length affect both beads
(more dense or less dense)
► always reprogram the buttonhole after any changes to
the stitch length

manual Buttonholes

► mark the buttonhole length in the desired position
► use Buttonhole foot no. 3C (optional accessory)

automatic Buttonholes

► mark the length of just one buttonhole
► after sewing the first buttonhole, the length for all
subsequent buttonholes is automatically programmed
► mark only the beginning of all subsequent buttonholes
► use Automatic buttonhole foot no. 3A
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